So I want to buy a 144hz monitor that I see more fps because I can see only max 60 fps on my Omen 18 but it shows more and more. The question is: if I connect the monitor with my laptop, I'll see more fps or only 60?
It depends on how much your graphics card creates. And you have to increase the Hz itself in the settings. Either under windows or in the Nvidia settings
I think you have to select the 144 Hz monitor as the second monitor then it should work problem-solving.
No maximum, it can only go to 60 hz, but always shows 140
It does not matter.
Hz and fps have nothing in common first.
If you get nen 144Hz monitor, do you think that you suddenly get 144fps? No, that's not it.
Stay on top of the current monitor and turn on V-Sync in the game. Thus you prevent first Tearing, what your actual question might be.
Whether you can prevent tearing with 144Hz. Yes you can.